CVE-2026-81994 [HIGH] – Acrobat Reader is affected by an Improperly Controlled Modification of Object Prototype At

Acrobat Reader is affected by an Improperly Controlled Modification of Object Prototype Attributes (‘Prototype Pollution’) vulnerability that could lead to arbitrary file system read. An attacker could exploit this vulnerability to access sensitive files and directories outside the intended access scope. Exploitation of this issue requires user interaction in that a victim must open a malicious file. Scope is changed.